Power issues account for a relatively small percentage of overall service requires, and are generally rather easy to diagnose.
Troubleshooting HP Laser Printer Power ProblemsTroubleshooting HP Laser Printer Power Problems
All too often in the past, however, I have wrongly classified customer complaints because power problems. Usually, the main reason for that is that I neglected to get enough information from the buyer, reacting in order with their first comment. The consumer may have said,"My machine's dead," and I intuitively believed"power problem." However, on investigation I found that the machine power cycled precisely but wasn't feeding paper.
When a customer approaches you using an observation that the machine doesn't do such a thing is dead, ask precisely what the printer did. Can it make any sounds? Did lights go off and forth? Did it act normally or when it was pushed up? In a nutshell, be sure you really have a power problem before jumping into that decision as the customer says the machine is dead.
Customers correctly presenting you with power issues generally offer diagnosis falling right into two separate categories. Either:
The machine did absolutely nothing when it had been powered up, or
There is some sign of life from the machine, but it didn't power up like it was likely to. Sounds or lights had been different, and also the machine either wouldn't print, or the printing was unacceptable.
The very first state is because of loss of AC power, while the second reason is symptomatic of improper or loss variance of both DC ability.
Nothing Happens
You power up the machine and nothing happens. Absolutely nothing. No noise, no lights, no motors engaging. Nothing. First thing to do is check lineup current. Don't visit the wall. First assess the current at the connector which plugs into the printer.
Then look for fuses and resets. Many machines possess them positions of immediate access. If it does not revive energy, then chances are excellent that you have an AC power problem. Some printers might require a fresh high volt power source or low voltage power supply.
Stuff Happens, But It's Just Not Right
That really is more prevalent and indicates that a malfunctioning DC or Low Voltage Power Supply. Laser printers utilize a number of different non voltages to power the many components and appliances of their systems. For instance, in the Canon SX Engine, the laser is powered by 24 VDC, as the Formatter PCA is powered by 5 VDC. In all laser printers, everything but the Fuser runs off DC power, and the voltages are critical despite the fact that the particular voltage levels can differ from one kind of printer into another location.
Most machines have conventional directions for verifying that the presence of the suitable DC voltages, Frequently, though, it's simpler to replace the DC Power Supply and see if normal operation is restored.
Laser Printer Service Rule of Thumb
A whole lot greater detail would be required if we were planning to service the ability Supplies themselves-we're not. Regrettably, it's frequently easier to intuitively diagnose a Electricity source failure than it is to spell out the signs and checks .
Generally, if There's not a good, logical explanation for the printer's behavior, and the behavior could be explained by inadequate, irregular or missing power, alter the Power Supply and determine whether corrects the malfunction
Be mindful that manufacturers anticipate some Electricity Supply issues. Consequently, virtually all Power Supplies have some type of fuse onto them. It may be a highly observable or it might be harder to find on the board.
The point is, often there is some thing like that there. If the fuse isn't readily apparent, you can remove shielding or housings to expose the underlying board(s).
Look first for the obvious fuses. If nothing appears familiar, start looking for your designation. Once found, the fuse must be assessed for continuity. When there is no persistence, there exists a good chance that could be the sole problem.
You may well be a bit worried concerning replacing the fuse, and especially if its replacement involves de-soldering and soldering onto a printed circuit board. Undoubtedly, if you don't have any experience in this area, it would be somewhat competitive 1o1 you to learn on a customer's equipment. But it you have the experience, dive right in.
When the fuse can be still an unknown component, contact a parts adviser at Metrofuser. They will be able to complement it using an appropriate component.
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